[Taqwus]

Seems the best rule is to put a UPC (or TVF, if you're Temporal) in every system. And, for a neutral, avoid doing anything at all... heh. It's a tough one to keep Jubilant, I suspect (compared to, say, Peaceful in a huge quadrant -- the vast amount of colonization and production you do keeps 'em happy and busy).

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-- The thing that goes bump in the night